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本文对以Capriquat溶液萃取海水中的镉,再用高氯酸溶液进行反萃取,无火焰原子吸收法测定反萃取液中镉的方法进行了详尽的讨论。用lvo1％ capriquat的二甲苯溶液可以定量地萃取海水中的镉,再用0.2mo1/1的高氯酸液溶定量也反萃取有机相中的镉,无火焰原子吸收法能测定高氯酸溶液中镉,重现性好。寻找了镉的萃取分离和定量测定的最佳条件,当把这种方法应用到实际海水测定的时候,此法与螯合树脂分离法—无火焰原子吸收法的测定结果非常一致。本文也对Capriquat萃取镉的萃取化学类型作了进一步的讨论。
In this paper, Capriquat solution extracted cadmium in seawater, and then perchloric acid solution for stripping, non-flame atomic absorption method for the determination of cadmium in the stripping solution were discussed in detail. With lvo1% capriquat xylene solution can be quantitatively extracted cadmium in seawater, and then 0.2mo1 / 1 perchloric acid dissolved in the amount of stripping organic phase extraction of cadmium, flame atomic absorption spectrometry can determine perchloric acid solution Cadmium, good reproducibility. Looking for the optimum conditions for the extraction, separation and quantification of cadmium, this method is very consistent with the chelate resin separation method - flameless atomic absorption spectrometry when applied to actual seawater measurements. In this paper, the extraction chemistry of cadmium extracted by Capriquat is discussed further.